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New Project: Mini Gun Madness

The basic construction is relatively simple, with a standard 1/2 inch copper pipe serving as the main support for lightweight tubes (barrels) that spin and emit light when they pass in front of a high intensity LED source. A cheap cordless drill — something from Harbor Freight, for example —... Read more »

New Project: $5 HeliRocket

The HeliRocket is propelled by a standard model-rocket engine, but instead of the engine’s ejection charge deploying a parachute, it releases the rocket’s 3 tail fins. The fins then swing up into a helicopter blade configuration, which slows the rocket’s descent by converting much of its kinetic energy into drag... Read more »